I have a dataset (n=15) from product testing that has an outlier (force = 2.7lb) that makes it so the data fails normality testing (p=0.012), which (as I understand it) prevents the use of capability analysis. The average and standard deviation from the dataset (including the outlier) is 4.97 lb and 0.77 lb respectively, and without the outlier they are 5.14 lb and 0.46 lb. The spec is that the force needs to be greater than 1 lb. Clearly the product is well above the spec, but since I do not have normality due to the outlier, I don't know what statistical test I can use to demonstrate that the process is capable. Any thoughts?
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